company news about Merger selection principle of automobile fuse

        Since there are too many circuits in the power supply of the vehicle, it is inevitable to design a fuse for the power circuits of multiple components when choosing a fuse. Then which components can share the fuse and which must be protected separately, the fuse What is the principle of merger selection?

        The role of the fuse is to protect the wire. The choice of fuse capacity depends on the capacity of the electrical equipment and the state attributes of its load. A fuse can protect a section of wire or several wires at the same time, depending on the importance of the load. The choice of fuse sharing is related to the importance and safety level of the electrical appliance.

        Note that when the ambient temperature increases, the current carrying capacity of the fuse will decrease. Under normal circumstances, for the electrical components of the vehicle, the electricity load is divided into three categories according to the degree of importance:

1) Important Including engine control unit (PCM), brake anti-lock system control unit (ABS) and airbag system control unit (SAS) and other control units related to vehicle safety. This type of electrical load is not only critical to the performance and safety of the vehicle, but also this type of electrical equipment is sensitive equipment that is easily disturbed by other electrical equipment. Therefore, a separate fuse must be provided for this type of electrical equipment.

2) General important items Including all kinds of sensors of the engine, all kinds of warning lights and external lights, front windshield cleaning devices, horns and so on. This type of electrical load is also critical to the performance and safety of the entire vehicle, but this type of electrical load is not sensitive to mutual interference. Therefore, this type of electrical load can be combined with each other according to the situation, and a fuse can be used together.

3) Ordinary piece Including car audio system, electric heated seats, glove box lighting, electric mirrors, electric window system and so on. This type of electrical load is not very important to the vehicle. Electrical equipment generally added to improve the comfort of the driver and passengers. Therefore, for this type of electrical load, it can be combined with each other according to the situation, and a fuse can be used together.